HBase错误:zookeeper.znode.parent不匹配

我正在尝试学习Hadoop,并且我已经在Hadoop权威指南中找到了HBase部分.我试图启动HBase并得到错误.有人可以给我一步一步的指导吗？

opel@ubuntu:~$ zkServer.sh start
JMX enabled by default
Using config: /home/opel/zookeeper-3.4.6/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED
opel@ubuntu:~$ start-hbase.sh 
starting master, logging to /home/opel/hbase-0.94.20/logs/hbase-opel-master-ubuntu.out
opel@ubuntu:~$ hbase shell
HBase Shell; enter 'help' for list of supported commands.
Type "exit" to leave the HBase Shell
Version 0.94.20, r09c60d770f2869ca315910ba0f9a5ee9797b1edc, Fri May 23 22:00:41 PDT 2014

hbase(main):001:0> status
14/06/02 22:40:44 ERROR client.HConnectionManager$HConnectionImplementation: Check the value configured in 'zookeeper.znode.parent'. There could be a mismatch with the one configured in the master.
14/06/02 22:40:45 ERROR client.HConnectionManager$HConnectionImplementation: Check the value configured in 'zookeeper.znode.parent'. There could be a mismatch with the one configured in the master.
14/06/02 22:40:47 ERROR client.HConnectionManager$HConnectionImplementation: Check the value configured in 'zookeeper.znode.parent'. There could be a mismatch with the one configured in the master.
14/06/02 22:40:49 ERROR client.HConnectionManager$HConnectionImplementation: Check the value configured in 'zookeeper.znode.parent'. There could be a mismatch with the one configured in the master.
14/06/02 22:40:51 ERROR client.HConnectionManager$HConnectionImplementation: Check the value configured in 'zookeeper.znode.parent'. There could be a mismatch with the one configured in the master.
14/06/02 22:40:55 ERROR client.HConnectionManager$HConnectionImplementation: Check the value configured in 'zookeeper.znode.parent'. There could be a mismatch with the one configured in the master.
14/06/02 22:40:59 ERROR client.HConnectionManager$HConnectionImplementation: Check the value configured in 'zookeeper.znode.parent'. There could be a mismatch with the one configured in the master.

ERROR: org.apache.hadoop.hbase.MasterNotRunningException: Retried 7 times

Here is some help for this command:
Show cluster status. Can be 'summary', 'simple', or 'detailed'. The
default is 'summary'. Examples:

  hbase> status
  hbase> status 'simple'
  hbase> status 'summary'
  hbase> status 'detailed'

有什么不对的吗？